It seems that some recent changes have resulted in some problems with the My Ooma web site. I too cannot edit contacts. So with this issue along with the two that I've documented there are at least three things that need addressing.

I noticed the same thing a couple of days ago. I can create, but no editing. I have also noticed that when I click on the My Ooma tab from the Ooma main page I get an error screen. I have to hit back, then click on the My Ooma link a second time to get it to work.